Navien water heater error codes


Decipher and Troubleshoot Navien Water Heater Error Codes with Ease. Our Comprehensive Guide Provides a Detailed List of Navien Water Heater Error Codes, Along with Quick and Efficient Solutions for Common Heater Issues. Stay Informed, Stay Warm!”

All Navien Boiler Error Codes

Navien Boiler Error Code Problem
3 Ignition failure
004 False flame error
012 Flame loss
016 Overheated heat exchanger
030 Abnormal exhaust temperature
46 Overheated heat exchanger
047 Error on exhaust thermostat
060 An issue with the limit switch
109 Faulty Fan
110 Blockage in the exhaust
127 Faulty air pressure switch
205 The heating supply thermistor has short-circuited
218 The heating return thermistor has short-circuited
302 Low water pressure
352 High water pressure
353 Faulty water pressure sensor
407 Faulty hot water outlet thermistor
421 Faulty cold water inlet thermistor
480 Faulty hot water tank outlet thermistor
515 Problem with the relay feedback
517 Problem with the  dual in-line package switch setting
594 Problem with the  EEPROM
615 Problem with the input and memory
740 An Issue with the  outdoor temperature sensor
782 An issue with the main panel communication

These are just some of the most common error codes. The specific error codes that your water heater displays may vary depending on the model.

If you see an error code on your Navien water heater, it is important to first check the user manual for the specific meaning of the code. The manual will also provide troubleshooting tips that you can try.

If you are unable to fix the problem yourself, you should contact a qualified technician for assistance.

Here are some additional tips for troubleshooting Navien water heater error codes:

  • Check the power supply to the water heater. Make sure that the water heater is plugged in and that the power is turned on.
  • Check the water supply to the water heater. Make sure that the water supply is turned on and that there is no blockage in the water lines.
  • Check the drain hose for blockages.
  • Clean the filters in the water heater.
  • Reset the water heater by turning it off and then on again.

If you have tried all of these troubleshooting steps and the error code is still displayed, then you should contact a qualified technician for assistance.

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